Assessing carbonation in one-part fly ash/slag geopolymer mortar: Change in pore characteristics using the state-of-the-art technique neutron tomography

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dc.contributor.authorVu, THen_AU
dc.contributor.authorGowripalan, Nen_AU
dc.contributor.authorDe Silva, Pen_AU
dc.contributor.authorParadowska, AMen_AU
dc.contributor.authorGarbe, Uen_AU
dc.contributor.authorKidd, Pen_AU
dc.contributor.authorSirivivatnanon, Ven_AU
dc.date.accessioned2021-02-15T19:48:46Zen_AU
dc.date.available2021-02-15T19:48:46Zen_AU
dc.date.issued2020-11-01en_AU
dc.date.statistics2021-02-15en_AU
dc.description.abstractCarbonation has long been recognised as a durability issue attributed to corrosion of steel reinforcement in geopolymer materials. The currently available information, however, is not sufficient to gain a deep understanding of this issue, particularly the facet of the carbonation impact on the pore structure of such materials. This paper, thus, assessed the influence of carbonation on porosity and pore size characteristics of one-part fly ash/slag geopolymer mortar, by using neutron tomography. The cutting-edge thermal neutron tomography used in this study provided the prowess of non-destructive 3D analysis of exploring different regions within geopolymers. The results obtained showed that carbonation in the investigated geopolymer mortars drew their porosity down approximately 30% and shifted pore size regions to smaller pore areas. Other evaluations such as changing pH, carbonation front depth and elemental mapping by scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDS) were also performed in this study, in order to supplement the findings of neutron tomography. © 2020 Elsevier Ltd.en_AU
dc.identifier.articlenumber103759en_AU
dc.identifier.citationVu, T. H., Gowripalan, N., De Silva, P., Paradowska, A., Garbe, U., Kidd, P., & Sirivivatnanon, V. (2020). Assessing carbonation in one-part fly ash/slag geopolymer mortar: change in pore characteristics using the state-of-the-art technique neutron tomography. Cement and Concrete Composites, 114, 103759. doi:10.1016/j.cemconcomp.2020.103759en_AU
dc.identifier.issn0958-9465en_AU
dc.identifier.journaltitleCement and Concrete Compositesen_AU
dc.identifier.urihttps://doi.org/10.1016/j.cemconcomp.2020.103759en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10411en_AU
dc.identifier.volume114en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectFly ashen_AU
dc.subjectSlagsen_AU
dc.subjectPorosityen_AU
dc.subjectPore structureen_AU
dc.subjectMicrostructureen_AU
dc.subjectTomographyen_AU
dc.subjectCorrosionen_AU
dc.subjectSteelsen_AU
dc.subjectScanning electron microscopyen_AU
dc.subjectX-ray spectroscopyen_AU
dc.titleAssessing carbonation in one-part fly ash/slag geopolymer mortar: Change in pore characteristics using the state-of-the-art technique neutron tomographyen_AU
dc.typeJournal Articleen_AU
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